To: ROCKLOBSTER
Is it true that it takes far more energy to manufacture a photovoltaic cell than it will ever produce?
According to
The National Renewable Energy Laboratory, a propaganda arm of the DOE, the energy break even point is 4 years for polycrystalline and 3 years for thin film. This is a pretty neat graph of the efficiency of various PV technologies. The more efficient the more costly.
![](http://1.bp.blogspot.com/-i3_Q787sIuY/TXGHnLZBUwI/AAAAAAAAmWk/hPUNL-755LU/s1600/5-1910b.png)
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11 posted on
11/18/2014 5:42:10 AM PST by
Mycroft Holmes
(The fool is always greater than the proof.)
To: Mycroft Holmes
"The more efficient the more costly. "
Can't Congress make that illegal? Bend the cost curve?
16 posted on
11/18/2014 5:53:38 AM PST by
Paladin2
To: Mycroft Holmes
To: Mycroft Holmes
And the effective lifetime of that PV cell array is little longer: Efficiency drops dramatically the first few months of exposure to the sun and environment, then levels off but keeps declining. So power produced is highest the first 3 months of the array’s lifetime, and it will never go up. After one year, most are producing 50-60% of the original nameplate rating.
A useful life of 12 to 14 years is about maximum.
30 posted on
11/18/2014 6:17:19 AM PST by
Robert A Cook PE
(I can only donate monthly, but socialists' ABBCNNBCBS continue to lie every day!)
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